Rotary engine.



W. P. MOMANNAMY & J. P. JOHNSON.

ROTARY ENGINE.

APPLIOATION FILED OUT- 12, 1910.

994,595. Patented June 6, 1911.

4 SHEBTS-SHEET 1.

- IIIII- IHIII L2 mum i I H mm 11 ATTORNEYS 1m: mmms PETERS cm,WASHINGTON, o. c

W. P. MGMANNAMY & J. P. JOHNSON.

' ROTARY ENGINE.

APPLIOATION FILED 0073 12, 1910.

994,595, Patented June 6,1911.

4 SHEETS-SHEET 2.

5 MW. [Willa/fl "X 1/0 5 P16722150 OWVM I 1 ATTORNEYS 1.4: mmma PETERSco.. wnsnmcmu, n. c,

W. P. MGMANNAMY & J. P. JOHNSON.

ROTARY ENGINE.

APPLICATION FILED OUT 12, 1910.

Patented June 6, 1911.

4 sums-$11331 4.

n15 mmms PETERS co, wnsnmarcn, n c.

rinir are WILLIAM P. IVIGMANNAMY AND JOHN P. JOHNSON, 0F KALISPELL,MONTANA.

ROTARY ENGINE.

To all whom it may concern:

Be it known that we, TVILLIAM P. Mo- MANNAMY and J OI-IN P. JOHNSON,both citizens of the United States, and residents of Kalispell, in thecounty of Flathead and State of Montana, have invented new and usefulImprovements in Rotary Engines, of which the following is a full, clear,and exact description.

Our invention relates to rotary engines, particularly for steam or othergaseous driving agents, and has for its object to provide an engine ofthis character, capable of working eiiiciently in any position, withespecial provision of means to prevent or reduce the leakage of steam.

The novel features of the invention will appear from the descriptionfollowing hereinafter, and particularly from the appended claims.

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a plan view of a rotary engine embodying our invention, withparts in section; Fig. 2 is a vertical section on the line 22 of Fig. 1;Fig. 3 is a vertical section through the piston chamber, the plane ofsection being perpendicular to the piston shaft; Fig. 4 is a verticalsection substantially on the line k4: of Fig. 1; and Fig. 5 is a detail,showing the adjustable connection of certain cam disks.

The annular body A surrounds a chamber A, through which extendscentrally the shaft B carrying a piston composed of a cylindricalportion G and a tangential outward extension C in contact with thecylindrical wall of the chamber A. The side Walls of the chamber areformed by heads A which with the ring A form a casing or cylinder heldtogether by bolts D or other wise. The tangential extension C has atransverse cylindrical projection 0 adjacent the inner end of thetangential surface, and the working face of the piston has a projectingtransverse edge 0 This projection and edge fit into correspondingrecesses in the periphery of the piston C forming a steam tight joint,and at the same time allowing for the expansion and contraction of thepiston.

The ring-shaped body A is made with an upward extension A containing achamber Specification of Letters Patent.

Application filed October 12, 1910.

Patented June '6, 1911.

Serial No. 586,637.

A" for the admission of steam and a radial slideway for the abutment E,engaging the piston C, C. Steam (or some other driving agent) enters thechamber A through a passage A controlled by a rocking valve F, whichalso serves as a cut-oft. On the stem F of the valve is secured an arm F2 having an adjustable pivotal connection at F F with a link G, thelower end of which is pivotally connected at G with an angular lever Hfulcrumed on the frame at H. This lever carries a roller H arranged totravel in a cam groove J of a disk J held to rotate with the shaft 13 bymeans of connections described hereinafter. As the shaft rotates, thevalve F will be opened and closed alternately, the amount of themovement or throw being greater or less according as the connection F 3is broughtnearer to or farther away from the valve axis F.

The abutment E is provided with a rod E extending through a suitablestutling box and terminating in a fork E pivotally connected with a linkK having a like connection at L with an arm L, on a rock shaft Ljournaled in brackets A, A of the frame. Another arm L rigidly securedto said rock shaft has an adjustable pivotal connection at M, M with alink M whose lower end is pivotally connected with an angular lever Nfulcrumed on the frame at H and carrying rollers N. The link M and leverN are similar to the link G and lever H, but instead of one roller thelever N carries two rollers N arranged to travel in two similar camtracks 0 in disks 0 held to rotate with the shaft B. Of course, thelever N might be operated by a single cam disk.

The abutment E is wider than the piston C, C (see Fig. 2) so as tooverlap it at each side, and the overlapping portions engage packingrings P contained in annular grooves of the heads A and pressed inward,against the end faces of the pistons C, G by springs R. The outerperipheries of the packing rings are flush with the outer surface ot thepiston body C.

The disk J is rigidly secured to the shaft B, in which case the relativetiming of the valve F and of the abutment E would always be the same. Asa rule, however, we prefer to provide for adjustable timing, which maybe accomplished by having one of the disks J, 0 adjustable relatively tothe other cireumferentially. Thus, as shown in Figs. f and 5, the disk 0is loose on the shaft B and has segmental slots 0 through which passbolts S secured to the disk J to turn therewith about the shaft B, theparts being secured after adjustment by means of nuts S.

The operation of the engine, being of the well known character, need notbe described in detail. Steam enters through the chamber A"; passesbetween the abutment E and the piston extension C and rotates thepiston, escaping through the outlet A when the extension C has clearedit. The cam disks 0 operate the abutment E and the cam disk J actuatesthe valve F. The stroke of the abutment can be adjusted by moving thepivot connection M toward or from the rock shaft L The throw of thevalve F and the amount of steam admitted,-oan be adjusted in a similarmanner, as previously explained. By adjusting the disk J relatively, tothe disk 0, the beginning and end of steam admission can be timeddifferently with reference to the movements of the abutment E, thusvarying the length of the time during which the steam works eXpansivelyafter the valve has been closed.

The improved engine will work equally well in any position. Two or morecylinders and pistons may be used, combined so that their workingperiods will alternate or overlap, so as to avoid dead centers. Theconstruction of the piston of two separate parts C, C will allow forexpansion, and contraction. The packing rings P, instead of beingspring-pressed, may be held against the piston by steam. Thesemodifications and others may be made without departing from the natureof our invention as set forth inthe appended claims.

Having thus described our invention, we claim as new and desire tosecure by Letters Patent:

1. A rotary engine comprising a casing, a piston therein, a shaftconnected with said piston, a movable abutment engaging said piston,means operated by said shaft for actuating the abutment at regularintervals, and means connecting the abutment withthe actuating means,said connecting means being adjustable to vary the amount of throw ofthe abutment.

2. A rotary engine comprising a casing, a piston therein, a shaft forthe piston, a movable abutment in the casing engaging the piston, avalve for the casing, a plurality of cams operated by the piston shaft,said cams being adjustably connected together, and connections to theabutment and the valve actuated by the cams.

, Copies of this patent may be obtained for on, mechanisms separatelyconnected to the 7 arm and the lever to be operated thereby, and cammeans located adjacent the said lever and rock arm and actuated by theshaft to operate the lever and the rock shaft.

5. In a rotary engine, the combination of a casing, a piston thereincomprising a cylindrical central part, a part mounted on the centralpart having a working face, said part also having a transversecylindrical.

projection and a transverse projecting edge fitting into correspondingrecesses in the central part to form a steam-tight joint, and means forcontrolling the piston in its movement.

a piston mounted to turn therein, a movable abutment engaging saidpiston, a rock shaft operatively connected with said abutment, means foradmitting the driving agent, and an actuating connection between thepiston and the rock shaft, said connection includ ing means adjustabletoward and from the rock shaft to vary its throw.

7 In a steam engine, the combination of a casing, a piston therein, avalve for the casing, a slotted lever connected to the valve, a rodadjustably connected to the slotted lever to vary the amount of throw ofthe valve, an adjustable cam operated from.

the piston to actuate the rod, the adjustment of the cam serving to timethe actuation of the valve, an abutment cooperating with the piston, aslotted lever connected to the abutment, a second rod adjustablyconnected to the abutment lever to vary the amount of throw of the same,and means for operating the second rod.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing wltne-sses.

WVILLIAM P. McMANNAMY. JOHN P. JOHNSON.

Witnesses:

T. A. THOMPSON, W. H. GRIFFIN.

five cents each, by addressing the Commissioner ofPatents, Washington,D. G.

6. A rotary engine, comprising a casing,

